The blog as a knowledge base

Microsoft has a term "knowledge base article" which solves a particular problem or at least describes it better.
It comes out, there's a term http://en.wikipedia.org/wiki/Knowledge_base

Today was the second time I use the blog as a knowledge base. I know I have stumbled upon a problem, I think I wrote about it, I search the blog - there it is, and it solves my problem again.
Great, another usage of the seemingly useless blog.